Olmstead is one of the sponsors of a
push to reverse a 2006 voter-approved amendment that defines marriage
as a heterosexual union.

“I feel like it's time to start
fighting for it here,” said Olmstead, who is gay but does not have
any immediate plans to marry. “I think Colorado has changed from
then to now. I'm not entirely sure it's changed enough, but it's
about time to start talking about it.”

A proposed ballot question is being
reviewed by the state title board, which is expected to rule next
week. If approved, proponents of the measure would have to collect
roughly 86,000 signatures to secure a spot on the 2012 ballot.

A civil unions bill died in a House
committee earlier this year after passage in the Senate.